QUEBEC HEAVY VEHICLE KNOWLEDGE TEST 03

As a commercial driver in Quebec, Canada, it is vital to understand and abide by the strict traffic rules that govern the transport industry.

QC Commercial Driver Licence - Quiz 3

When the brake pedal has been applied, what happens immediately after compressed air pushes on the diaphragm of the brake chamber?

a. The S-cam is rotated

b. The brake shoes come into contact with the drum

c. The brake shoes are pulled apart

d. The push rod is pushed

Question 1 of 30

What happens when the parking brake knob is pushed in?

a. The air supply control is activated

b. The trailer brakes become clamped

c. Compressed air fills the brake chambers

d. Compressed air is released from the brake chambers

Question 2 of 30

When is jackknifing most likely to occur?

a.When the angle between the push rod and the slack adjuster is 90°

b.When the space between the brake lining and the brake drums is too large

c.When the brake linings are worn down

d.When the anti-lock braking system comes into play because the driver is attempting to stop urgently

Question 3 of 30

Which of the following statements is true about the primary and secondary circuits of an air brake system?

a. One circuit cannot work without the other

b. The driver controls the two circuits separately

c. The two circuits work in synchronicity

d. The two circuits work independently

Question 4 of 30

Air brake systems might operate at different pressure levels, but the difference in pressure between when the air compressor starts and stops operating is always the same. It is:

a. 138 kPa

b. 176 kPa

c. 152 kPa

d. 114 kPa

Question 5 of 30

Which is not a major factor contributing to 'brake fading'?

a. Continuous and unnecessary 'riding' of the brakes

b. Improper brake adjustment

c. Excessive force on the brake pedal

d. Prolonged braking distance

Question 6 of 30

What mechanism causes the vehicle to slow down in a drum brake system when the driver presses the brake pedal?

a. Air in the brake chambers is emptied, which squeezes strong return springs

b. Air in the supply reservoirs is released, activating an air purifier

c. Two brake shoes covered with linings press against the drum

d. The S-cam drives a rod which causes a slack adjuster to make the brakes clamp

Question 7 of 30

What would two needles in an air pressure gauge indicate?

a. The minimum and maximum air pressure in the service reservoirs

b. The minimum and maximum amount of air pressure that gets into the brake chambers when the brakes are applied

c. The amount of air pressure in the service reservoirs for each of the circuits

d. The amount of air pressure that gets into the brake chambers when the brakes are applied

Question 8 of 30

What is the correct way to ensure you are following the vehicle in front at a safe distance:

a. Get very close to the vehicle in front and then slowly apply the brakes and count to 4 seconds

b. Estimate the length of the vehicle you are trailing and ensure there are about four of those vehicle lengths in between you

c. Turn on your high beams and check that the vehicle in front is at least beyond the range of the beams

d. Leave one second for every three metres of your vehicle's length and count out the seconds using a stationary object at the side of the road

Question 9 of 30

Which of the following situations could prevent you from clearing an overpass even if your vehicle is shorter than the height indicated?

a. There is vehicle coming from the other direction

b. There is a sign indicating strong crosswinds in the area

c. There is a thick amount of packed snow on the roads

d. There is a heavy load inside your trailer

Question 10 of 30

Why is it important for drivers to know about brake lag?

a. Fluid in hydraulic brakes is compressed more easily than air

b. Air brake systems generally require longer stopping distance than hydraulic systems

c. Driver reaction time is longer with air brakes

d. Hydraulic brakes react less quickly than air brakes to the application of the brake pedal

Question 11 of 30

What is an essential guideline to follow when negotiating a curve?

a. Always look to the right when you are navigating a curve

b. Change gears only after you enter the curve

c. Avoid braking in curves

d. Avoid accelerating in curves

Question 12 of 30

As a responsible driver, you should look ahead over the distance you will be covering in the next:

a. 5-8 seconds

b. 3-6 seconds

c. 17-20 seconds

d. 12-15 seconds

Question 13 of 30

If the low pressure light comes on, indicating that your service brake system is failing, what should you do?

a. Pull the parking brake control out immediately

b. Flip the switch to activate the engine brakes, as these will stop the vehicle

c. Within a few seconds, choose somewhere safe to stop your vehicle

d. Find the best spot to pull over within the next 5km

Question 14 of 30

If you doing a brake adjustment inspection, what is the sign that your brake(s) needs to be adjusted?

a. If the push road travel is more than 19mm

b. If pulling the slack adjuster requires considerable strength

c. If the brakes on the same axle have identical push rod travel measurements

d. If the push rod is coming out of the brake chamber

Question 15 of 30

The emergency brake will take over and bring the vehicle to a stop when the pressure in the service brakes drops below:

a. 242 kPa

b. 380 kPa

c. 550 kPa

d. 446 kPa

Question 16 of 30

Which of the following is not an appropriate use for the trailer hand brake?

a. To check that the semitrailer is properly hitched

b. To check that the service brakes of the trailer are working after being hitched

c. As an alternative option if you want to reduce wear on the parking brake

d. To bring the semitrailer to a stop during the hitching process

Question 17 of 30

Which of the sequences below correctly describes how air from the outside of the vehicle travels through the brake system?

a. Supply reservoir; service reservoirs; air compressor; brake chambers; air filter

b. Air compressor; air filter; supply reservoir; service reservoirs; brake chambers

c. Brake chambers; service reservoirs; supply reservoir; air filter; air compressor

d. Air filter; supply reservoir; service reservoirs; air compressor; brake chambers

Question 18 of 30

If an air compressor begins operating when the air pressure in the service reservoirs drops below 714 kPa, then the air compressor will stop filling them when the pressure reaches:

a. 852 kPa

b. 890 kPa

c. 866 kPa

d. 828 kPa

Question 19 of 30

If you are carrying a heavy load, why is it important to increase your stopping distance rather than increasing your braking power when bringing the vehicle to a stop?

a. To prevent the over-rotation of the S-cam

b. To prevent the brake chambers from filling with too much air

c. To prevent the brakes from overheating

d. To prevent the air pressure in the service reservoirs from dropping too low

Question 20 of 30

If you are making a turn in a heavy vehicle, when is the correct time to accelerate?

a. As you come out of the turn

b. Any time, as long as you have checked your rearview mirror and blind spots

c. As you enter the turn

d. As you are about halfway through the intersection

Question 21 of 30

What does the acronym GVWR stand for?

a. Gross Vehicle Weight Rating

b. Grid Voltage Wheel Rotation

c. Gross Volume Weight Restriction

d. Gear Valve Wear Resistance

Question 22 of 30

When entering a right curve in a heavy vehicle, the driver should:

a. Keep the front of the vehicle closer to the right side of the road

b. Aim to keep the vehicle aligned in the centre of the lane

c. Keep the front of the vehicle closer to the centre line or the left side of the lane

d. Use his or her mirrors to monitor the path of the rear wheels

Question 23 of 30

Which of the following is not one of the factors determining the braking power?

a. Radius of the brake shoes

b. Length of the slack adjuster

c. Size of the diaphragm

d. Rotation of the S-cam

Question 24 of 30

What does the air pressure gauge tell you?

a. The difference in pressure between the two brake circuits

b. How much air pressure there is in the service reservoirs

c. The air pressure travelling via brake hoses between adjoining trailers

d. How much compressed air pressure gets into the chambers when the brakes are applied

Question 25 of 30

What is best practice for using your supplemental brakes when going down a hill with a loaded vehicle?

a. Flip the engine brake switch and then apply constant force to the brake pedal

b. Ensure you are in the low gear range, flip the engine brake switch and take your foot off the accelerator

c. Upshift to the high gear range and flip the engine brake switch

d. Apply a steady amount of force on the accelerator and then flip the engine brake switch

Question 26 of 30

How is compressed air supplied to a semitrailer's reservoirs?

a. From the two service reservoirs of the truck or tractor

b. From the compressor

c. From the emergency reservoir

d. From the supply reservoir of the truck or tractor

Question 27 of 30

How often should you be checking your rearview mirrors?

a. For about 5-6 seconds straight every minute to get a full grasp of what is happening behind you

b. Before changing lanes to see if anyone is in your blind spots

c. Quick glances every 10-12 seconds and to complete manoeuvres safely

d. Only to see if cargo is still secured

Question 28 of 30

Retarders will:

a. Do the same thing as a runaway lane if your brakes fail

b. Work well in any gear

c. Automatically be operable

d. Slow down but not stop your vehicle

Question 29 of 30

What is the purpose of an air purifier in an air brake system?

a. It reduces the time required to bleed the air reservoirs

b. It removes the need to bleed the air reservoirs

c. It makes the bleeding process more complicated

d. It reduces the frequency with which you need to bleed the air reservoirs

Question 30 of 30

Some of these rules include mandatory vehicle inspections, strict speed limits, and adherence to hours of service regulations. Commercial drivers must also have a Commercial Driver’s License (CDL) obtained after passing various tests to assess knowledge and skill levels. Commercial drivers need to be aware of the rules of the road, such as yielding to pedestrians, obeying traffic signals, and avoiding distracted driving. Ignoring these rules can have severe consequences, including fines, license suspensions, and even imprisonment in some cases. Furthermore, commercial drivers are subject to stricter blood-alcohol limits and may be required to undergo regular drug and alcohol testing to ensure safety on the road. By following such regulations, commercial drivers can help prevent accidents and injuries while operating their vehicles in Quebec.

To begin your career in commercial driving, you must obtain your Quebec Class 1, Class 2, Class 3, or Class 4 Heavy Vehicle Driver Licence.
These online practice tests were developed to help individuals study for their Heavy Vehicle driver’s licence. Our practice testing area is designed to help you learn the information on your actual written knowledge test and familiarize you with the testing format. All testing material is covered in official Quebec’s ‘Driving a Heavy Vehicle‘ manual.